Can T1635-600G replace T3035H-6G?

[Margaret]

We selected the Triac ST# T1635-600G for refrigerator project, to control the compressor (inductive loads). Tested T1635-600G, the heat is very serious when passing 16A current, even using a heat sink temperature is more than 100°C. Therefore, I want to use T3035H-6G. May I ask how much heat sink is required for this model when it passes 16A? Or do you have app recommendations? Are there any guidelines on heat dissipation? Thank you!

[Tesla DeLorean]

Suggest you work with your local rep or support engineer, or submit this as an online support request rather than on the forum.

[AScha.3]

just from ds : T16xx :

T30xx :

So at 16A : about 19W -> 16W dissipation with T16 -> T30 ; ( about 20% less , with T30 )

>how much heat sink is required for this model when it passes 16A?

About the same, as with T16 ; but choose T30xx (T16 is at its limit - never good idea !)

>Or do you have app recommendations?

You need more/better heat sink.

>Are there any guidelines on heat dissipation?

Same, as always : the cooler you keep the semiconductor, the longer it will be alive . 🙂

Here, with 16W loss and desired heat sink temp of about 60° C , at max. 30° ambient you need : (60-30)/16 = 1.8 °/W heat sink. (Or smaller heat sink with forced cooling, using a fan.)

Something like this : (100mm size)

And be aware : triac is not isolated, so need isolated mounting and thermal grease !

[MarComDFD]

Please choose the T3035H-6G because is a 150°C max Tj so better in term of dissipation.